@inbook{16874,
  author = {Yan L. and Zeng Y. and Li L.},
  title = {Research on relation between social-economic status and health on Chinese elderly},
  year = {2010},
  journal = { Research on Elderly Population, Family, Health and Care Needs/Costs},
  pages = {116-35},
  publisher = {Science Press},
  address = {Beijing},
  language = {eng},
}